Hello Zhiwei,
Probably you should contact IAR for this information. It's possible the package is standard one on newer versions of Eclipse. You might want to check the release notes for the IAR plug-in to see which versions of Eclipse are supported. It's possible it is for a new version of Eclipse than the one you have installed with S32 Design Studio for Arm. Probably IAR could guide you to the correct plug-in version for the IAR compiler you wish to use and for the Eclipse version included with the S32 Design Studio for Arm version you've chosen.
Best Regards,
Mike